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A Search for New Physics in Dijet Mass and Angular Distributions in pp Collisions at sqrt(s) = 7 TeV Measured with the ATLAS Detector

G. Aad S. Albrand 1 M.L. Andrieux 1 B. Clement 1 J. Collot 1 S. Crépé-Renaudin 1 P. de Saintignon 1 P.A. Delsart 1 J. Donini 1 D. Dzahini 1 J.Y. Hostachy 1 E. Laisne 1 F. Ledroit-Guillon 1 A. Lleres 1 A. Lucotte 1 F. Malek 1 P. Martin 1 F. Polci 1 J. Stark 1 X. Sun 1 B. Trocmé 1 H. Bachacou 2 F. Bauer 2 N. Besson 2 M. Boonekamp 2 L. Chevalier 2 F. Chevallier 2 J. Ernwein 2 A.I. Etienvre 2 A. Formica 2 L. Gauthier 2 P.F. Giraud 2 C. Guyot 2 S. Hassani 2 W. Kozanecki 2 E. Lancon 2 J.F. Laporte 2 E. Le Menedeu 2 M. Legendre 2 B. Lenzi 2 B. Mansoulie 2 J.-P. Meyer 2 N. Morange 2 R. Nicolaidou 2 A. Ouraou 2 D.M. Pomarede 2 B. Resende 2 C.R. Royon 2 Ph. Schune 2 J. Schwindling 2 O. Simard 2 M. Virchaux 2 J. Yu 2 C. Biscarat 3 E. Cogneras 3 G. Rahal 3 T. Beau 4 S. Bordoni 4 G. Calderini 4 A. Camard 4 P. Cavalleri 4 E. Chareyre 4 S. de Cecco 4 F. Derue 4 D. Imbault 4 M.W. Krasny 4 D. Lacour 4 B. Laforge 4 O. Le Dortz 4 J. Lellouch 4 G. Marchiori 4 I. Nikolic-Audit 4 J. Ocariz 4 M. Ridel 4 L. Roos 4 Ph. Schwemling 4 Timothée Theveneaux-Pelzer 4 S. Trincaz-Duvoid 4 T.N. Trinh 4 F. Vannucci 5 L. Aperio-Bella 6 B. Aubert 6 N. Berger 6 J. Colas 6 L. Di Ciaccio 6 T.K.O. Doan 6 M. El Kacimi 6 S. Elles 6 P. Ghez 6 M. Gouanere 6 C. Goy 6 T. Guillemin 6 L. Helary 6 T. Hryn'Ova 6 P. Iengo 6 G. Ionescu 6 A. Jeremie 6 S. Jézéquel 6 M. Kataoka 6 J. Labbe 6 Jérémy Lévêque 6 R. Lafaye 6 N. Massol 6 P. Perrodo 6 H. Przysiezniak 6 G. Sauvage 6 T. Todorov 6 D. Tsionou 6 I. Wingerter-Seez 6 R. Zitoun 6 Y. Zolnierowski 6 Emmanuel Busato 7 D. Calvet 7 S. Calvet 7 Reina Coromoto Camacho Toro 7 Diane Cinca 8 R. Febbraro 7 P.L.Y. Gris 7 N. Ghodbane 7 C. Guicheney 7 D. Pallin 7 F. Podlyski 7 C. Santoni 7 L. P. Says 7 F. Vazeille 7 S. Viret 7 S. Aoun 9 C.P. Bee 9 C. Benchouk 9 K. Bernardet 9 N. Bousson 9 J.C. Clemens 9 Y. Coadou 9 P. Delpierre 9 F. Djama 9 F. Etienne 9 L. Feligioni 9 F. Henry-Couannier 9 D. Hoffmann 9 F. Hubaut 9 E.B.F.G. Knoops 9 E. Le Guirriec 9 B. Li 9 E. Monnier 9 J. Odier 9 E. Petit 9 P. Pralavorio 9 Z. Qian 9 A. Rozanov 9 M. Talby 9 N. Tannoury 9 S. Tisserant 9 J. Toth 9 F. Touchard 9 L. Vacavant 9 H. Abreu 10 C. Arnault 10 E. Augé 10 P. Barrillon 10 M. Benoit 10 S. Binet 10 J.-B. Blanchard 10 C. Bourdarios 10 D. Breton 10 C. Collard 10 C. de la Taille 10 J.B. de Vivie de Regie 10 S. Diglio 10 F. Dudziak 10 L. Duflot 10 M. Escalier 10 A.C. Falou 10 L. Fayard 10 D. Fournier 10 J.-F. Grivaz 10 M. Heller 10 S. Henrot-Versillé 10 J. Hrivnac 10 L. Iconomidou-Fayard 10 J. Idarraga 10 M. Kado 10 A. Lounis 10 N. Makovec 10 P. Matricon 10 Y. Nakahama 10 F. Niedercorn 10 L. Poggioli 10 P. Puzo 10 A. Renaud 10 D. Rousseau 10 X. Ruan 10 G. Rybkin 10 J.B. Sauvan 10 J. Schaarschmidt 10 A.C. Schaffer 10 L. Serin 10 S. Simion 10 R. Tanaka 10 D. Varouchas 10 J.J. Veillet 10 I. Vukotic 10 F. Wicek 10 D. Zerwas 10 Zhiqing Zhang 10 M. Kuna 4 Sandrine Laplace 4, 6
Abstract : A search for new interactions and resonances produced in LHC proton-proton (pp) collisions at a centre-of-mass energy sqrt(s)= 7 TeV has been performed with the ATLAS detector. Using a data set with an integrated luminosity of 36 pb-1 dijet mass and angular distributions have been measured up to dijet masses of \sim 3.5 TeV and found to be in good agreement with Standard Model predictions. This analysis sets limits at 95% C.L. on various models for new physics: an excited quark is excluded with mass between 0.60 and 2.64 TeV, an axigluon hypothesis is excluded for axigluon masses between 0.60 and 2.10 TeV and Randall-Meade quantum black holes are excluded in models with six extra space-time dimensions for quantum gravity scales between 0.75 and 3.67 TeV. Production cross section limits as a function of dijet mass are set using a simplified Gaussian signal model to facilitate comparisons with other hypotheses. Analysis of the dijet angular distribution using a novel technique 18 simultaneously employing the dijet mass excludes quark contact interactions with a compositeness scale {\Lambda} below 9.5 TeV.
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Submitted on : Tuesday, March 22, 2011 - 8:56:36 AM
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G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, et al.. A Search for New Physics in Dijet Mass and Angular Distributions in pp Collisions at sqrt(s) = 7 TeV Measured with the ATLAS Detector. New Journal of Physics, Institute of Physics: Open Access Journals, 2011, 13, pp.053044. ⟨10.1088/1367-2630/13/5/053044⟩. ⟨in2p3-00578732⟩

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